1213011512 has 16 divisors (see below), whose sum is σ = 2277063360. Its totient is φ = 605794624.

The previous prime is 1213011497. The next prime is 1213011571. The reversal of 1213011512 is 2151103121.

It is a super-2 number, since 2×1213011512² = 2942793856489052288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81608 + ... + 95319.

It is an arithmetic number, because the mean of its divisors is an integer number (142316460).

Almost surely, 2^1213011512 is an apocalyptic number.

It is an amenable number.

1213011512 is a deficient number, since it is larger than the sum of its proper divisors (1064051848).

1213011512 is a wasteful number, since it uses less digits than its factorization.

1213011512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177790 (or 177786 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 1213011512 is about 34828.3148027578. The cubic root of 1213011512 is about 1066.4855467650.

Adding to 1213011512 its reverse (2151103121), we get a palindrome (3364114633).

The spelling of 1213011512 in words is "one billion, two hundred thirteen million, eleven thousand, five hundred twelve".